v2020: Land LAVA 2021.05 fixes to main branch

Up to v2020 this package is special as it is used to both:

1. produce the apertis-tests package
2. ship the templates for LAVA directly from git

The second point relies on fixes landing to the apertis/v2020 branch immediately, as the pipeline does not know about apertis/v2020-updates or the likes.

Given that there are no actual changes to the package other than a version bump let's land !255 (merged) there to make the LAVA pipeline pick up the fixes.